A device and method for in-situ collection and detection of pesticide residues on fruit surfaces

A pesticide residue detection and pesticide residue technology, applied in measurement devices, material excitation analysis, instruments, etc., can solve the problems of inability to extract pesticide residues in fruit samples, not fully automated detection, etc., and achieve the goal of less other reagents, small volume, and convenience. effect used

Active Publication Date: 2021-09-21
SOUTH CHINA UNIV OF TECH
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  • Claims
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Problems solved by technology

[0008] However, most of the current microfluidic detection methods for pesticide residues cannot extract pesticide residues from fruit samples. They just inject the pre-extracted and pretreated fruit sample liquid containing pesticide residues into the microfluidic chip for detection, which has not been realized. Fully automated detection

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  • A device and method for in-situ collection and detection of pesticide residues on fruit surfaces

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with specific embodiments.

[0034] Such as figure 1 shown. The invention discloses an in-situ collection and detection device for pesticide residues on fruit surfaces, which comprises a sample flushing module 1, an ultrapure water pool 2, a surface-enhanced Raman base pool 3, a first metering micropump 4, a second metering micropump 5, a Man detection area 6, third metering micropump 7, waste liquid pool 8, Raman spectrometer 9, computer 10;

[0035] The sample flushing module 1 includes: a flushing bracket 11, a liquid collection pool 13, and a sampling pool 14 arranged sequentially from top to bottom;

[0036] A plurality of nozzles 22 are arranged around the inner bottom of the scouring bracket 11; a filter tank 12 is provided at the connection between the upper part of the liquid collection pool 13 and the scouring bracket 11;

[0037] The ultrapure water pool 2 and the surface-enhanc...

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Abstract

The invention discloses a device and method for in-situ collection and detection of pesticide residues on the fruit surface; during the detection process of the device, the computer turns on the switch of the first metering micropump to control the surface-enhanced Raman base pool, so that the enhancer flows into the sample flushing module to rinse the sample surface , when 10mL of sample liquid is to be accumulated, the computer controls to turn off the first metering micropump, open the second metering micropump and the valve, so that the sample liquid flows into the Raman detection area through the microtube, and the Raman spectrometer detects the concentration of the sample liquid in the microfluidic chip. The Raman spectrum signal of the pesticide, the computer analyzes the Raman spectrum signal to determine the pesticide residue in the sample.

Description

technical field [0001] The invention relates to the field of pesticide residue detection, in particular to a device and method for in-situ collection and detection of pesticide residues on fruit surfaces. Background technique [0002] Pesticides play an essential role in my country's agricultural production, including insecticides, herbicides, fungicides, rodenticides and plant growth regulators. However, the unreasonable use of pesticides and fertilizers for a long time (such as not strictly implementing the withdrawal period or excessive use of pesticides, etc.) has caused pesticide residues in agricultural products to exceed the standard. Although long-term consumption of agricultural and sideline products with excessive pesticide residues will not cause acute poisoning, it may cause chronic poisoning, cause disease, and even affect the next generation; in addition, with the improvement of people's living standards, consumers are not only concerned about food Taste and n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 孙大文吴蕾蕾蒲洪彬韦庆益
Owner SOUTH CHINA UNIV OF TECH
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